package com.yumaolin.util.TwoDimensionCode;

import java.awt.image.BufferedImage;
import java.io.File;
import java.io.IOException;
import java.io.OutputStream;
import javax.imageio.ImageIO;
import com.google.zxing.common.BitMatrix;

public class MatrixToImageWriter {

	   private static final int BLACK = 0xFF000000;  
	   private static final int WHITE = 0xFFFFFFFF;  
	   
	   private MatrixToImageWriter() {}  
	     
	   public static BufferedImage toBufferedImage(BitMatrix matrix) {  
	     int width = matrix.getWidth();  
	     int height = matrix.getHeight();  
	     BufferedImage image = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);  
	     for (int x = 0; x < width; x++) {  
	       for (int y = 0; y < height; y++) {  
	         image.setRGB(x, y, matrix.get(x, y) ? BLACK : WHITE);  
	       }  
	     }  
	     return image;  
	   }  
	   
	     
	   public static void writeToFile(BitMatrix matrix, String format, File file)  
	       throws IOException {  
	     BufferedImage image = toBufferedImage(matrix);  
	     if (!ImageIO.write(image, format, file)) {  
	       throw new IOException("Could not write an image of format " + format + " to " + file);  
	     }  
	   }  
	   
	   public static void writeToStream(BitMatrix matrix, String format, OutputStream stream)  
	       throws IOException {
	     BufferedImage image = toBufferedImage(matrix);  
	     if (!ImageIO.write(image, format, stream)) {
	       throw new IOException("Could not write an image of format " + format);  
	     }  
	   }  

}